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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2022 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fluent-bit/flb_input_plugin.h>
#include <fluent-bit/flb_network.h>
#include <msgpack.h>
#include "tcp.h"
#include "tcp_conn.h"
#include "tcp_config.h"
/*
* For a server event, the collection event means a new client have arrived, we
* accept the connection and create a new TCP instance which will wait for
* JSON map messages.
*/
static int in_tcp_collect(struct flb_input_instance *in,
struct flb_config *config, void *in_context)
{
struct flb_connection *connection;
struct tcp_conn *conn;
struct flb_in_tcp_config *ctx;
ctx = in_context;
connection = flb_downstream_conn_get(ctx->downstream);
if (connection == NULL) {
flb_plg_error(ctx->ins, "could not accept new connection");
return -1;
}
flb_plg_trace(ctx->ins, "new TCP connection arrived FD=%i", connection->fd);
conn = tcp_conn_add(connection, ctx);
if (conn == NULL) {
flb_plg_error(ctx->ins, "could not accept new connection");
flb_downstream_conn_release(connection);
return -1;
}
return 0;
}
/* Initialize plugin */
static int in_tcp_init(struct flb_input_instance *in,
struct flb_config *config, void *data)
{
unsigned short int port;
int ret;
struct flb_in_tcp_config *ctx;
(void) data;
/* Allocate space for the configuration */
ctx = tcp_config_init(in);
if (!ctx) {
return -1;
}
ctx->collector_id = -1;
ctx->ins = in;
mk_list_init(&ctx->connections);
/* Set the context */
flb_input_set_context(in, ctx);
port = (unsigned short int) strtoul(ctx->tcp_port, NULL, 10);
ctx->downstream = flb_downstream_create(FLB_TRANSPORT_TCP,
in->flags,
ctx->listen,
port,
in->tls,
config,
&in->net_setup);
if (ctx->downstream == NULL) {
flb_plg_error(ctx->ins,
"could not initialize downstream on %s:%s. Aborting",
ctx->listen, ctx->tcp_port);
tcp_config_destroy(ctx);
return -1;
}
flb_input_downstream_set(ctx->downstream, ctx->ins);
/* Collect upon data available on the standard input */
ret = flb_input_set_collector_socket(in,
in_tcp_collect,
ctx->downstream->server_fd,
config);
if (ret == -1) {
flb_plg_error(ctx->ins, "Could not set collector for IN_TCP input plugin");
tcp_config_destroy(ctx);
return -1;
}
ctx->collector_id = ret;
return 0;
}
static int in_tcp_exit(void *data, struct flb_config *config)
{
struct mk_list *tmp;
struct mk_list *head;
struct flb_in_tcp_config *ctx;
struct tcp_conn *conn;
(void) *config;
ctx = data;
mk_list_foreach_safe(head, tmp, &ctx->connections) {
conn = mk_list_entry(head, struct tcp_conn, _head);
tcp_conn_del(conn);
}
tcp_config_destroy(ctx);
return 0;
}
static struct flb_config_map config_map[] = {
{
FLB_CONFIG_MAP_STR, "format", (char *)NULL,
0, FLB_TRUE, offsetof(struct flb_in_tcp_config, format_name),
"Set the format: json or none"
},
{
FLB_CONFIG_MAP_STR, "separator", (char *)NULL,
0, FLB_TRUE, offsetof(struct flb_in_tcp_config, raw_separator),
"Set separator"
},
{
FLB_CONFIG_MAP_STR, "chunk_size", (char *)NULL,
0, FLB_TRUE, offsetof(struct flb_in_tcp_config, chunk_size_str),
"Set the chunk size"
},
{
FLB_CONFIG_MAP_STR, "buffer_size", (char *)NULL,
0, FLB_TRUE, offsetof(struct flb_in_tcp_config, buffer_size_str),
"Set the buffer size"
},
/* EOF */
{0}
};
/* Plugin reference */
struct flb_input_plugin in_tcp_plugin = {
.name = "tcp",
.description = "TCP",
.cb_init = in_tcp_init,
.cb_pre_run = NULL,
.cb_collect = in_tcp_collect,
.cb_flush_buf = NULL,
.cb_exit = in_tcp_exit,
.config_map = config_map,
.flags = FLB_INPUT_NET_SERVER | FLB_IO_OPT_TLS
};
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